Reheating-furnace.



.S.ROGERS. REHEATING FURNACE.

APPLICATION FILED FEB. 5, 1914.

COLUMBIA PLANOGRAPH 60., WASHINGTON, D. c.

W. s. ROGERS.

Y REHEATING FURNACE. APPLIOATION I'ILED'FEBj, 1914.

1,1 00,782, Patented June 23, 191i 2 SHEBTS-SHEBT 2.

\\\\ nfo v a 7nmm COLUMBIA PLANdORAPH 60., WASHINGTON, D4 c.

UNITED STATES PATENT OFFICE.

WINFIELD S. ROGERS, 0F BANTAM, CONNECTICUT, ASSIGNOR 0F ONE-HALF '10NELLIE IVL SCOTT, OF BANTAM, CONNECTICUT.

REHEATING-FURN ACE.

Specification of Letters Patent.

Application filed February 5, 1914. Serial No. 816,667.

To all whom it may concern Be it known that I, WINFIELD S. ROGERS,

a citizen of the United States, residing at Bantam, in the county ofLitchfield and State of Connecticut, have invented a new and usefulReheating-Furnace, of which the following is a specification.

This invention relates to a reheating furnace particularly designed forthe reheating of small metal parts such as iron rings or collars, orother similar articles.

One of the objects of the invention is to provide an improvedconstruction in such furnaces by which the passage of the materialthrough the furnace shall be facilitated and a uniform and advantageousdis tribution of heat will be obtained.

Another object of the invention is to provide a construction in whichall of the moving parts of the apparatus are fully protected from hightemperatures and in which the driving mechanism is located entirelybelow the heating chamber and beyond the influence of the hot gases usedin the operation of the apparatus.

With these objects in view my invention comprises certain features andcombinations of parts which will be hereinafter described and moreparticularl pointed out in the appended claims.

A preferred form of my invention is shown in the drawings in whichFigure 1 is a side elevation of a reheating furnace, partly in section;Fig. 2 is an elevation partly in section taken at right angles to theplane of Fig. 1; Fig. 3 is a sectional plan view taken on the line 33 ofFig. 1;' Fig. 4 is a similar View taken on the line 44 of Fig. 1.

The reheating furnace shown in the drawings comprises a set of heavycastings or legs 10 upon which the moving parts of the apparatus aremounted and which also support the upper part 11 of the apparatus whichconstitutes the furnace proper. The upper part 11 is formed of firebrick or other heat-resisting material and comprises a heating chamber12 and a combustion chamber 13. These chambers are circular in crosssection as shown in Fig. 4 and within the chamber 12 there is rotatablymounted a circular table 14. Upon its upper surface this table supportsa thick layer 15 of fire-resisting tile which constitutes the bottom ofthe heating chamber. From the center of the tile layer 15 there projectsa heat deflecting cone 16 formed of similar material. The heatingchamber 12 is separated from the combustion chamber 13 by an archedpartition 17 also formed of heat-resisting material and having aplurality of openings 18 therein which connect the two chambers.

Any suitable provision may be made for supplying heated gases to thecombustion chamber and I have herein indicated a fuel burner B ofordinary form adapted to project gaseous or liquid fuel through themixing chamber 19 to the combustion chamber 18. A baffle plate 20partially separates the mixing chamber 19 from the combustion chamber13, deflecting the mixture upwardly and producing a more uniformdistribution of the charge throughout the combustion chamber. The hotgases of combustion move downwardly through the openings 18 into theheating chamber 12 and are drawn out through the exhaust fines 21.

In order to provide for feeding the parts or material to be reheated, Iconstruct an inwardly inclined opening or passage 22 through one of theside walls of the furnace, the inner end of the bottom of the inclinedpassage being substantially on a level with the surface of the rotatingtile. An exit passage 23 is also provided which is inclined similarly tothe passage 22 but in the opposite direction, the upper inner edge ofthe bottom of the passage being substantially on a level with thesurface of the rotating tile. A guide 24 is secured to, the wall of thefurnace and projects inwardly from the edge of the exit passage 23, theinner end of the guide 24 be ing in close proximity to the cone 16. Asthe table is rotated in the direction of the arrow A in Fig. 4 it willbe seen that small articles such as the collars C placed in the passage22 will move inwardly and downwardly until they rest upon the rotatingtile which will eventually bring them into contact with the guide 24 bywhich they will be forced outwardly until they reach the exit passage 23and thus pass out of the furnace. As they leave the passage 23 they mayfall upon a suitable conveyer or may be received in a receptacleconveniently located.

The table 14 is a massive circular casting supported upon ananti-friction heavy rotating shaft 25. The shaft 25 rotates in a bearing26 of any usual type mounted in a heavy cross frame 27 which in turn issecured to the base 10. The lower end of the shaft 25 is supported uponan anti-friction bearing 28 which supports the weight of the table andtakes the end thrust of the shaft. An additional side bearing 29receives the side thrust at the lower end of the shaft due to thedriving mechanism and is herein shown as being of the anti-frictiontype.

The driving mechanism comprises a heavy worm gear 30 mounted upon theshaft 25 with which meshes a worm 31 mounted upon a shaft 32 and drivenfrom any convenient source of power. The driving means for the shaft 32preferably includes provision for varying the speed of rotation of theshaft so that the rate of travel of the table 14: may be properlycoordinated to the nature of the Work.

lVhile the operation of the device has been indicated in the precedingdescription, it may be briefly summarized as follows: Liquid or gaseousfuel is introduced through the burner 18, passing through the mixingchamber 19, and being evenly distributed through the combustion chamber13 by the balfle plate 20. The hot gases then pass downwardly throughthe openings 18 into the chamber 12 and are drawn outwardly through thefines 21. The cone 16 serves to deflect the gases passing down throughthe center of the partition 17, and increases the amount of heatreceived by the outer por- 'tions of the rotating table, thus insuring avery uniform distribution of heat throughout the heating chamber.

I regard it as a very important feature of my device that all of themoving parts of the furnace with the exception of the tile layer 15 andthe cone 16 are entirely out of contact with the heated gases. lViththis arrangement, I am enabled to give the table 14: and the shaft 25 anextremely heavy and rigid construction without subjecting them toexcessive strains due to the unequal heating of different portionsthereof. I have also so arranged my apparatus that all of the drivingmechanism is a substantial distance below the heating chamber andentirely beyond the influence of the heated gases. Both of theseprovisions are exceedingly important in practical operation.

Having thus described my invention it will be evident that certainchanges and modifications can be made therein by those skilled in theart without departing from the spirit and scope of the invention asexpressed in the claims and I do not wish to be limited to the detailsherein disclosed, but

l hat I do claim is 1. A reheating furnace having in combination acylindrical heating chamber, a circular table closely fitting saidchamber and mounted to be slowly rotated therein, said chamber having aflat unobstructed upper surface supporting a heavy layer ofheatrosisting material and having a central heat distributing cone ofsimilar material, said cone being effective to evenly distribute the hotgases throughout the heating chamber.

2. A reheating furnace having in combination a cylindrical heatingchamber having side entrance and exit passages therein, a circular tablerotatable in said chamber, and guiding means in said chamber, saidentrance and exit openings being inwardly and outwardly inclinedrespectively with relation to said table and cooperating with saidguiding means to facilitate the passage of the reheated material throughand out of the furnace.

In testimony whereof I have hereunto set my hand, in the presence of twosubscribing witnesses.

WINFIELD S. ROGERS. lVitnesses RUTH Enwanns, HELEN L. HATCH.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. G.

